/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:36:51,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:36:51,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:36:51,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:36:51,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:36:51,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:36:51,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:36:51,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:36:51,650 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:36:51,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:36:51,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:36:51,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:36:51,652 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:36:51,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:36:51,652 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:36:51,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:36:51,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:36:51,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:36:51,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:36:51,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:36:51,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:36:51,654 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:36:51,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:36:51,654 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:36:51,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:36:51,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:36:51,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:36:51,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:36:51,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:36:51,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:36:51,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:36:51,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:36:51,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:36:51,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:36:51,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:36:51,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:36:51,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:36:51,945 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:36:51,967 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:36:51,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:36:51,972 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:36:51,972 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:36:51,973 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-11-06 22:36:52,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6430158bc/82df815853f54071bcb8033dff69c15a/FLAG9ac3a07bb [2019-11-06 22:36:52,643 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:36:52,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-11-06 22:36:52,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6430158bc/82df815853f54071bcb8033dff69c15a/FLAG9ac3a07bb [2019-11-06 22:36:52,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6430158bc/82df815853f54071bcb8033dff69c15a [2019-11-06 22:36:52,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:36:52,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:36:52,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:52,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:36:52,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:36:52,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:52" (1/1) ... [2019-11-06 22:36:52,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92a67df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:52, skipping insertion in model container [2019-11-06 22:36:52,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:52" (1/1) ... [2019-11-06 22:36:52,828 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:36:52,882 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:36:53,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:53,378 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:36:53,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:53,516 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:36:53,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53 WrapperNode [2019-11-06 22:36:53,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:53,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:36:53,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:36:53,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:36:53,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... [2019-11-06 22:36:53,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... [2019-11-06 22:36:53,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... [2019-11-06 22:36:53,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... [2019-11-06 22:36:53,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... [2019-11-06 22:36:53,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... [2019-11-06 22:36:53,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... [2019-11-06 22:36:53,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:36:53,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:36:53,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:36:53,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:36:53,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:36:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:36:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:36:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:36:53,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:36:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:36:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:36:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:36:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:36:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:36:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:36:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:36:54,870 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:36:54,870 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:36:54,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:54 BoogieIcfgContainer [2019-11-06 22:36:54,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:36:54,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:36:54,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:36:54,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:36:54,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:52" (1/3) ... [2019-11-06 22:36:54,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487d65a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:54, skipping insertion in model container [2019-11-06 22:36:54,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:53" (2/3) ... [2019-11-06 22:36:54,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487d65a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:54, skipping insertion in model container [2019-11-06 22:36:54,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:54" (3/3) ... [2019-11-06 22:36:54,891 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2019-11-06 22:36:54,902 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:36:54,911 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:36:54,923 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:36:54,951 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:36:54,951 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:36:54,951 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:36:54,951 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:36:54,952 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:36:54,952 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:36:54,952 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:36:54,952 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:36:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:36:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:36:54,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:54,990 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:54,991 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1789175463, now seen corresponding path program 1 times [2019-11-06 22:36:55,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:55,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429131226] [2019-11-06 22:36:55,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:55,533 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429131226] [2019-11-06 22:36:55,535 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:55,535 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:55,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675394927] [2019-11-06 22:36:55,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:55,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:55,567 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:36:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:56,493 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-11-06 22:36:56,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:56,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-11-06 22:36:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:56,512 INFO L225 Difference]: With dead ends: 618 [2019-11-06 22:36:56,512 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:36:56,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:36:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:36:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:36:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-11-06 22:36:56,594 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 107 [2019-11-06 22:36:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:56,595 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-11-06 22:36:56,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-11-06 22:36:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-06 22:36:56,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:56,603 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:56,603 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:56,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1651920546, now seen corresponding path program 1 times [2019-11-06 22:36:56,604 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:56,604 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493466762] [2019-11-06 22:36:56,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:56,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493466762] [2019-11-06 22:36:56,767 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:56,767 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:56,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188058078] [2019-11-06 22:36:56,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:56,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:56,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:56,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:56,770 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 3 states. [2019-11-06 22:36:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:57,309 INFO L93 Difference]: Finished difference Result 923 states and 1364 transitions. [2019-11-06 22:36:57,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:57,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-11-06 22:36:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:57,316 INFO L225 Difference]: With dead ends: 923 [2019-11-06 22:36:57,316 INFO L226 Difference]: Without dead ends: 609 [2019-11-06 22:36:57,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-11-06 22:36:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-11-06 22:36:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-11-06 22:36:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 848 transitions. [2019-11-06 22:36:57,363 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 848 transitions. Word has length 115 [2019-11-06 22:36:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:57,363 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 848 transitions. [2019-11-06 22:36:57,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 848 transitions. [2019-11-06 22:36:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 22:36:57,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:57,369 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:57,369 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1194422463, now seen corresponding path program 1 times [2019-11-06 22:36:57,370 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:57,370 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999745144] [2019-11-06 22:36:57,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:57,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999745144] [2019-11-06 22:36:57,465 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:57,465 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:57,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223606765] [2019-11-06 22:36:57,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:57,467 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:57,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:57,467 INFO L87 Difference]: Start difference. First operand 609 states and 848 transitions. Second operand 6 states. [2019-11-06 22:36:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:58,339 INFO L93 Difference]: Finished difference Result 1839 states and 2692 transitions. [2019-11-06 22:36:58,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:58,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-11-06 22:36:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:58,350 INFO L225 Difference]: With dead ends: 1839 [2019-11-06 22:36:58,350 INFO L226 Difference]: Without dead ends: 1236 [2019-11-06 22:36:58,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:36:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2019-11-06 22:36:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1213. [2019-11-06 22:36:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2019-11-06 22:36:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1689 transitions. [2019-11-06 22:36:58,454 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1689 transitions. Word has length 129 [2019-11-06 22:36:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:58,462 INFO L462 AbstractCegarLoop]: Abstraction has 1213 states and 1689 transitions. [2019-11-06 22:36:58,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1689 transitions. [2019-11-06 22:36:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 22:36:58,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:58,475 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:58,476 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1695944947, now seen corresponding path program 1 times [2019-11-06 22:36:58,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:58,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443236332] [2019-11-06 22:36:58,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:58,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443236332] [2019-11-06 22:36:58,630 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:58,630 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:58,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613385338] [2019-11-06 22:36:58,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:58,631 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:58,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:58,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:58,632 INFO L87 Difference]: Start difference. First operand 1213 states and 1689 transitions. Second operand 6 states. [2019-11-06 22:36:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:59,777 INFO L93 Difference]: Finished difference Result 3045 states and 4314 transitions. [2019-11-06 22:36:59,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:59,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-11-06 22:36:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:59,790 INFO L225 Difference]: With dead ends: 3045 [2019-11-06 22:36:59,791 INFO L226 Difference]: Without dead ends: 1838 [2019-11-06 22:36:59,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:36:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2019-11-06 22:36:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1817. [2019-11-06 22:36:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2019-11-06 22:36:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2438 transitions. [2019-11-06 22:36:59,870 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2438 transitions. Word has length 135 [2019-11-06 22:36:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:59,870 INFO L462 AbstractCegarLoop]: Abstraction has 1817 states and 2438 transitions. [2019-11-06 22:36:59,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2438 transitions. [2019-11-06 22:36:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:36:59,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:59,876 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:59,876 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1552967928, now seen corresponding path program 1 times [2019-11-06 22:36:59,877 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:59,877 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4720138] [2019-11-06 22:36:59,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:00,073 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4720138] [2019-11-06 22:37:00,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868338018] [2019-11-06 22:37:00,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:37:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:00,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:37:00,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:37:00,345 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:37:00,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:37:00,444 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 10 [2019-11-06 22:37:00,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460083410] [2019-11-06 22:37:00,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:00,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:00,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:00,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:37:00,448 INFO L87 Difference]: Start difference. First operand 1817 states and 2438 transitions. Second operand 3 states. [2019-11-06 22:37:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:01,061 INFO L93 Difference]: Finished difference Result 4646 states and 6306 transitions. [2019-11-06 22:37:01,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:01,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-11-06 22:37:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:01,073 INFO L225 Difference]: With dead ends: 4646 [2019-11-06 22:37:01,073 INFO L226 Difference]: Without dead ends: 1658 [2019-11-06 22:37:01,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 284 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:37:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2019-11-06 22:37:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2019-11-06 22:37:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2019-11-06 22:37:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2145 transitions. [2019-11-06 22:37:01,135 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2145 transitions. Word has length 142 [2019-11-06 22:37:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:01,136 INFO L462 AbstractCegarLoop]: Abstraction has 1658 states and 2145 transitions. [2019-11-06 22:37:01,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2145 transitions. [2019-11-06 22:37:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:37:01,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:01,142 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:37:01,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:37:01,358 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1301222022, now seen corresponding path program 1 times [2019-11-06 22:37:01,359 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:01,359 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448507030] [2019-11-06 22:37:01,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:01,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448507030] [2019-11-06 22:37:01,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368161627] [2019-11-06 22:37:01,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:37:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:01,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:37:01,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:01,708 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:01,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1791988673] [2019-11-06 22:37:01,859 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 149 [2019-11-06 22:37:01,916 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:37:01,916 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)